INVESTMENT IN UNCONSOLIDATED JOINT VENTURES (Income) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Oct. 28, 2009	Oct. 03, 2005	Mar. 02, 2005	Sep. 30, 2004	Aug. 31, 2004	Nov. 30, 2001
Revenues
Rental income	$ 6,097,079	$ 5,918,704	$ 12,170,173	$ 11,865,056
Laundry and Sundry Income	38,001	44,226	78,389	81,860
Total Revenues	6,135,080	5,962,930	12,248,562	11,946,916
Expenses
Administrative	85,144	107,753	180,167	209,319
Depreciation and amortization	1,471,070	1,455,912	2,937,666	2,884,483
Management Fees	163,373	169,769	326,989	329,609
Operating	363,687	449,258	921,175	1,035,337
Renting	66,466	99,537	111,123	145,134
Repairs and Maintenance	620,035	615,611	1,112,141	1,284,594
Taxes and Insurance	771,892	681,764	1,557,303	1,392,161
Total Expenses	3,541,667	3,579,604	7,146,564	7,280,637
Income Before Other Income	2,593,413	2,383,326	5,101,998	4,666,279
Other Income (loss)
Interest Expense	(1,735,366)	(1,777,262)	(3,466,987)	(3,386,606)
Other Income (Expense)				(3,829,950)
Gain on Sale of Real Estate	305,320	1,411,960	738,983	3,056,723
Total Other Income (Loss)	(1,430,046)	(365,302)	(2,728,004)	(4,159,833)
Net Income (Loss)	1,163,367	2,018,024	2,373,994	506,446
Proportionate share of net income (loss)	513,406	(561,639)	1,062,345	539,262
NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 240,292	$ 815,658	$ 563,716	$ 1,683,416
Ownership interest (as a percent)	50.00%	50.00%	50.00%	50.00%
NERA 40%
Other Income (loss)
Proportionate share of net income (loss)	$ 273,114	$ (1,377,297)	$ 498,630	$ (1,144,154)
Ownership interest (as a percent)	40.00%	40.00%	40.00%	40.00%
Hamilton Essex 81
Revenues
Rental income	$ 450,538	$ 406,813	$ 910,111	$ 818,035
Laundry and Sundry Income	3,865	4,380	6,870	7,385
Total Revenues	454,403	411,193	916,981	825,420
Expenses
Administrative	9,876	3,629	15,255	13,309
Depreciation and amortization	119,887	119,697	239,432	233,982
Management Fees	17,021	15,505	34,227	28,709
Operating	15,594	15,903	37,045	40,034
Renting	5,187	7,760	8,517	11,050
Repairs and Maintenance	26,786	31,680	64,670	86,181
Taxes and Insurance	61,476	62,662	123,306	125,189
Total Expenses	255,827	256,836	522,452	538,454
Income Before Other Income	198,576	154,357	394,529	286,966
Other Income (loss)
Interest Expense	(122,015)	(108,607)	(243,020)	(207,920)
Total Other Income (Loss)	(122,015)	(108,607)	(243,020)	(207,920)
Net Income (Loss)	76,561	$ 45,750	151,509	$ 79,046
Ownership interest (as a percent)		50.00%		50.00%
Hamilton Essex 81 | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 38,281	$ 22,875	$ 75,755	$ 39,523
Ownership interest (as a percent)	50.00%		50.00%
Hamilton Essex Development
Revenues
Rental income	$ 25,951	53,928	$ 101,241	107,856
Total Revenues	25,951	53,928	101,241	107,856
Expenses
Administrative	7,582	5,527	9,674	6,014
Depreciation and amortization	5,075	664	10,149	1,329
Management Fees	2,160	2,157	4,320	4,314
Operating			8
Repairs and Maintenance	3,180	3,180	3,180	7,343
Taxes and Insurance	15,183	16,473	30,860	33,196
Total Expenses	33,180	28,001	58,191	52,196
Income Before Other Income	(7,229)	25,927	43,050	55,660
Other Income (loss)
Net Income (Loss)	(7,229)	$ 25,927	43,050	$ 55,660
Ownership interest (as a percent)		50.00%		50.00%
Hamilton Essex Development | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ (3,614)	$ 12,964	$ 21,525	$ 27,830
Ownership interest (as a percent)	50.00%		50.00%
345 Franklin
Revenues
Rental income	$ 417,850	388,256	$ 803,093	792,092
Laundry and Sundry Income	(805)	1,544	584	2,761
Total Revenues	417,045	389,800	803,677	794,853
Expenses
Administrative	4,653	6,739	10,043	13,194
Depreciation and amortization	86,226	86,508	172,453	172,759
Management Fees	16,387	16,673	30,443	32,799
Operating	17,921	16,338	40,524	36,919
Renting	8,473	4,720	11,993	5,217
Repairs and Maintenance	23,810	25,415	42,277	46,911
Taxes and Insurance	35,369	30,538	75,609	72,169
Total Expenses	192,839	186,931	383,342	379,968
Income Before Other Income	224,206	202,869	420,335	414,885
Other Income (loss)
Interest Expense	(94,834)	(96,514)	(189,082)	(193,475)
Total Other Income (Loss)	(94,834)	(96,514)	(189,082)	(193,475)
Net Income (Loss)	129,372	$ 106,355	231,253	$ 221,410
Ownership interest (as a percent)		50.00%		50.00%						50.00%
345 Franklin | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 64,686	$ 53,178	$ 115,627	$ 110,705
Ownership interest (as a percent)	50.00%		50.00%
Hamilton 1025
Revenues
Rental income	$ 23,466	32,141	$ 47,061	70,361
Total Revenues	23,466	32,141	47,061	70,361
Expenses
Administrative	2,708	1,071	4,402	2,570
Depreciation and amortization	3,195		6,391
Management Fees	934	1,106	1,899	2,614
Operating	88	30	862	187
Renting		108		108
Repairs and Maintenance	20,359	28,367	28,399	68,574
Taxes and Insurance	7,096	12,696	14,445	30,867
Total Expenses	34,380	43,378	56,398	104,920
Income Before Other Income	(10,914)	(11,237)	(9,337)	(34,559)
Other Income (loss)
Interest Expense		(21)		(46)
Gain on Sale of Real Estate	305,320	488,408	306,075	1,305,414
Total Other Income (Loss)	305,320	488,387	306,075	1,305,368
Net Income (Loss)	294,406	$ 477,150	296,738	$ 1,270,809
Ownership interest (as a percent)		50.00%		50.00%			50.00%
Hamilton 1025 | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 147,203	$ 238,575	$ 148,369	$ 635,405
Ownership interest (as a percent)	50.00%		50.00%
Hamilton Bay Apts
Revenues
Rental income		23,240	$ 3,629	45,443
Total Revenues		23,240	3,629	45,443
Expenses
Administrative	$ 841	5,359	4,214	8,425
Depreciation and amortization		12,000	5,420	22,000
Management Fees		898	145	1,920
Operating	37	365		1,190
Repairs and Maintenance		23,610	10,266	57,834
Taxes and Insurance	300	9,113	5,206	25,572
Total Expenses	1,178	51,345	25,251	116,941
Income Before Other Income	(1,178)	(28,105)	(21,622)	(71,498)
Other Income (loss)
Interest Expense		(26)	(6)	(75)
Gain on Sale of Real Estate		923,552	432,908	1,751,309
Total Other Income (Loss)		923,526	432,902	1,751,234
Net Income (Loss)	(1,178)	$ 895,421	411,280	$ 1,679,736
Ownership interest (as a percent)		50.00%		50.00%		50.00%
Hamilton Bay Apts | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ (589)	$ 447,711	$ 205,641	$ 839,868
Ownership interest (as a percent)	50.00%		50.00%
Hamilton Minuteman
Revenues
Rental income	$ 281,232	264,810	$ 556,069	528,938
Laundry and Sundry Income	228		2,135	(402)
Total Revenues	281,460	264,810	558,204	528,536
Expenses
Administrative	2,034	2,556	5,750	4,380
Depreciation and amortization	88,906	88,121	177,501	175,843
Management Fees	11,232	10,493	22,299	20,861
Operating	27,824	26,525	51,579	60,375
Renting	542	931	2,574	4,308
Repairs and Maintenance	45,649	25,807	82,321	45,424
Taxes and Insurance	32,518	31,604	64,769	62,650
Total Expenses	208,705	186,037	406,793	373,841
Income Before Other Income	72,755	78,773	151,411	154,695
Other Income (loss)
Interest Expense	(58,613)	(58,889)	(116,605)	(117,409)
Total Other Income (Loss)	(58,613)	(58,889)	(116,605)	(117,409)
Net Income (Loss)	14,142	$ 19,884	34,806	$ 37,286
Ownership interest (as a percent)		50.00%		50.00%				50.00%
Hamilton Minuteman | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ 7,071	$ 9,942	$ 17,403	$ 18,643
Ownership interest (as a percent)	50.00%		50.00%
Hamilton on Main Apts
Revenues
Rental income	$ 865,335	883,327	$ 1,688,003	1,741,539
Laundry and Sundry Income	10,018	9,905	20,080	19,031
Total Revenues	875,353	893,232	1,708,083	1,760,570
Expenses
Administrative	17,065	14,063	34,912	27,189
Depreciation and amortization	260,668	257,444	519,106	512,950
Management Fees	33,135	33,609	65,003	66,052
Operating	84,527	82,889	191,817	203,282
Renting	17,378	5,858	33,490	14,509
Repairs and Maintenance	192,894	143,666	317,086	326,040
Taxes and Insurance	102,907	103,474	207,339	208,025
Total Expenses	708,574	641,003	1,368,753	1,358,047
Income Before Other Income	166,779	252,229	339,330	402,523
Other Income (loss)
Interest Expense	(192,271)	(191,400)	(380,539)	(379,639)
Total Other Income (Loss)	(192,271)	(191,400)	(380,539)	(379,639)
Net Income (Loss)	(25,492)	$ 60,829	(41,209)	$ 22,884
Ownership interest (as a percent)		50.00%		50.00%					50.00%
Hamilton on Main Apts | NERA 50%
Other Income (loss)
Proportionate share of net income (loss)	$ (12,746)	$ 30,415	$ (20,604)	$ 11,442
Ownership interest (as a percent)	50.00%		50.00%
Dexter Park
Revenues
Rental income	$ 4,032,707	3,866,189	$ 8,060,966	7,760,792
Laundry and Sundry Income	24,695	28,397	48,720	53,085
Total Revenues	4,057,402	3,894,586	8,109,686	7,813,877
Expenses
Administrative	40,385	68,809	95,917	134,238
Depreciation and amortization	907,113	891,478	1,807,214	1,765,620
Management Fees	82,504	89,328	168,653	172,340
Operating	217,696	307,208	599,340	693,350
Renting	34,886	80,160	54,549	109,942
Repairs and Maintenance	307,357	333,886	563,942	646,287
Taxes and Insurance	517,043	415,204	1,035,769	834,493
Total Expenses	2,106,984	2,186,073	4,325,384	4,356,270
Income Before Other Income	1,950,418	1,708,513	3,784,302	3,457,607
Other Income (loss)
Interest Expense	(1,267,633)	(1,321,805)	(2,537,735)	(2,488,042)
Other Income (Expense)		(3,829,950)		(3,829,950)
Total Other Income (Loss)	(1,267,633)	(5,151,755)	(2,537,735)	(6,317,992)
Net Income (Loss)	682,785	$ (3,443,243)	1,246,567	$ (2,860,385)
Ownership interest (as a percent)		40.00%		40.00%	40.00%
Dexter Park | NERA 40%
Other Income (loss)
Proportionate share of net income (loss)	$ 273,114	$ (1,377,297)	$ 498,630	$ (1,144,154)
Ownership interest (as a percent)	40.00%		40.00%